US6666232B2ExpiredUtilityA1

Thermoformed intake duct made of non-woven material with double bending

68
Assignee: WECOSTAPriority: Oct 24, 2001Filed: Oct 17, 2002Granted: Dec 23, 2003
Est. expiryOct 24, 2021(expired)· nominal 20-yr term from priority
Inventors:Henri Lepoutre
F02M 35/10144F02M 35/1036Y10S138/11F02M 35/10321F02M 35/10137F16L 9/22F02M 35/10
68
PatentIndex Score
13
Cited by
17
References
6
Claims

Abstract

Thermoformed intake duct ( 1 ) made of non-woven material and including flanges ( 6, 7, 8, 9 ) parallel to the longitudinal axis of the duct, projecting from the outer surface of the duct, a first portion ( 4 ) of the duct being formed in the form of a first bellows, a first bellows-shaped portion ( 4 ) having two longitudinal flanges ( 6, 7 ) diametrically opposed along a first diameter (D 2 ), characterized in that the duct includes at least a second bellows-shaped portion ( 5 ) having two longitudinal flanges ( 8, 9 ) diametrically opposed along a second diameter (D 3 ) of the duct which makes, with respect to the first diameter (D 2 ) of the two flanges ( 6, 7 ) of the first bellows-shaped portion, a non-zero angle, and especially 90°.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
       1. Thermoformed intake duct made of non-woven material and including flanges parallel to the longitudinal axis of the duct, projecting from the outer surface of the duct, a first portion of the duct being formed in the form of a first bellows, a first bellows-shaped portion having two longitudinal flanges diametrically opposed along a first diameter, characterized in that the duct includes at least a second bellows-shaped portion having two longitudinal flanges diametrically opposed along a second diameter of the duct which makes, with respect to the first diameter of the two flanges of the first bellows-shaped portion, a non-zero angle. 
     
     
       2. Duct according to  claim 1 , wherein the two bellows portions are welded together so as to be adjacent, one beside the other. 
     
     
       3. Duct according to  claim 2 , wherein said non zero angle is 90°. 
     
     
       4. Duct according to  claim 1 , wherein said non zero angle is 90°. 
     
     
       5. Duct according to  claim 1 , wherein said flanges are present along the entire length of the duct. 
     
     
       6. Duct according to  claim 1 , wherein said flanges are flat shaped.

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